Add JS naming conventions

blog_posts/javascript-naming-conventions.md

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+---
+title: JavaScript naming conventions
+type: story
+tags: javascript,variable,cheatsheet
+authors: chalarangelo
+cover: blog_images/js-naming-conventions.jpg
+excerpt: Naming conventions, while not easy to enforce, make code easier to read and understand. Learn how to name your variables in JavaScript with this handy guide.
+---
+
+**Variables**
+
+- Names are case-sensitive, lowercase and uppercase are different.
+- Start variable names with a letter, use `camelCase` for names.
+- Variable names should be self-descriptive, describing the stored value.
+- Boolean variables are usually prefixed with `is` or `has`.
+
+**Functions**
+
+- Names are case-sensitive, lowercase and uppercase are different.
+- Start function names with a letter, use `camelCase` for names.
+- Use descriptive names, usually verbs in the imperative form.
+- Common prefixes are `get`, `make`, `apply` etc.
+- Class methods follow the same rules.
+
+**Constant**
+
+- Names are case-sensitive, lowercase and uppercase are different.
+- Define constants at the top of your file, function or class.
+- Sometimes `UPPER_SNAKE_CASE` is used, while other times plain `camelCase`.
+
+**Classes**
+
+- Names are case-sensitive, lowercase and uppercase are different.
+- Start class names with a capital letter, use `PascalCase` for names.
+- Use descriptive names, explaining the funcionality of the class.
+- Components, which are used in frontend frameworks follow the same rules.
+
+**Private**
+
+- Prefix any variable or function with `_` to show itention for it to be private.
+- As a convention, this will not prevent other parts of the code from accessing it.
+
+**Image credit:** [Paul Hanaoka](https://unsplash.com/@plhnk?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) on [Unsplash](https://unsplash.com/s/photos/code?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText)